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Technology In Pioneer PDP4270XD

by Colin Tang
16 March 2007
arrow 1. Introduction arrow 5. Picture Quality
arrow 2. Specification arrow 6. Technology
arrow 3. Setup & Design arrow 7. Audio
arrow 4. Operation arrow 8. Conclusion


Deep Waffle-shaped Rib Structure increases the area of light-emitting phosphors — increasing the brightness

The Pioneer PDP-4270XD uses their 7th Generation Plasma screen with the following features:

  • PUREBLACK Panel 2
  • Direct Colour Filter 2
  • Deep Waffle-shaped Rib Structure
  • PURE Drive 2HD - all-digital processing to reduce noise from digital-to-analogue conversion
  • i-CLEAR Drive - 10 bit processing avoids posterization and produces more subtle colour gradations
  • Dynamic HD converter - internal scaler processing
  • PAL 3D Y/C - comb filter to avoid cross colour and cross luminance artefacts for composite PAL signals
  • Noise Reduction
  • Colour Management
  • Active Dynamic Range Expander
  • PureCinema - film mode deinterlacer

For more information, please visit the Pioneer site by clicking on this link and selecting their feature presentation.



The PureCinema performs film mode deinterlacing using two modes: [Standard] 2:2 detection for interlaced 50hz film sources (includes PAL) and [ADV] for 3:2 detection on interlaced 60 Hz source. PureCinema then faithfully recreates the original film frames in 24 fps and outputs them in 75 or 100hz for [Standard] mode or 72 Hz for [ADV] mode.

For example:

DVD - 24 fps movie -> PAL 576i 50Hz output using 2:2 pulldown -> PureCinema [Standard] reverses 2:2 pulldown to recreate original 24fps -> TV progressively outputs 75 or 100Hz

If 2:2 pulldown is not reversed properly and simply deinterlaced (recombined) you could get combing and motion artifacts.

HD DVD / Bluray - 24 fps movie -> 1080i 60Hz output using 3:2 pulldown -> PureCinema [ADV] reverses 3:2 pulldown to recreate 24fps - > TV outputs 72Hz progressive frames (x3)

So if you have any high definition players that outputs 1080i60 films like most first and second generation players in the market right now, your current TV will perform deinterlacing and output it as 1080p60. Unfortunately, you will also inherit the judder that comes from 24 to 60 frame conversion. PureCinema cleverly gets around this with the above algorithm by allowing an integer multiplication of frames.

If you don't know what I'm talking about, just do the following three things:

1) Choose PureCinema [Standard] for DVD movies if your player outputs 576i or 1080i material at 50Hz.

2) Choose PureCinema [ADV] for your HD movies if your player outputs 1080i 60Hz.

3) If you have PureCinema on and notice any `tearing' or `combing' on standard broadcast, turn it OFF.

Please keep in mind that this only works on film material originally recorded in 24 fps. Any other material will develop artifacts with these modes. Also, PureCinema only works for interlaced sources fed to its inputs.

Colour Detail

Although the Pioneer offers colour temperature and colour management features in this submenu, you will not be able to make any meaningful adjustments if you don't have a colorimeter and calibration equipment.

You can choose between to general colour spaces for this Pioneer model. Colour Space 2 comes closest to HD 709 standards and will give natural colours on high definition material. Colour Space 1 creates more saturated colours particularly in the greens. You may prefer this on SD broadcasts as it may breathe some life into poor SD digital feeds.

Colour Transient Improvement (CTI) and Intelligent Colour produces subtle effects on colours althought it is not entirely clear to me how this is achieved. Looking at Pioneer's technological presentation, CTI seems to enhance colour saturation and image contrast to make the colours more vibrant. I left them both off for critical HD viewing as they are unnecessary, but they may have some application on SD material.

Noise Reduction

Like most recent HDTV sets, noise reduction is quickly becoming a standard feature. However, most of them still have a long way to go before technological perfection is achieved. MPEG NR and Digital NR are your standard spatial and temporal noise filter respectively. Block NR is used for HD material. I turned all of them off during our assessment and was still amazed with this set's picture performance. MPEG NR reduces the amount of mosquito noise in digital material at the cost of reduced overall detail. Digital NR reduces general image noise (fluctuating pixels) and is quite good for static images but may cause some motion smearing and loss of detail with moving objects.

DRE (Dynamic Range Expander)

I turned most of these features off but I like Pioneer's attention to consumer choice. You may want to experiment with these features to see if they add value to your pictures.

  • Dynamic contrast - changes image contrast for bright and sharp pictures but may flicker on some scenes given its on-the-fly processing
  • Black level - Enhances the darker elements of the picture, but shadow detail may suffer as a result.
  • ACL - automatic contrast limiter. Don't exactly know what this does.
  • Intelligent DRE - probably combines all of the above elements with dynamic processing
  • Gamma - Changes the mid tones of a picture. 1 being darker and 3 being the brightest. Gamma 2 should be a safe bet but in low ambient light conditions, Gamma 1 may make your picture `pop out' and assume a more 3 dimensional effect.

Back To: PDP4270XD Review

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